![background image](http://html.mh-extra.com/html/panasonic/sa-ht740gcp/sa-ht740gcp_service-manual_278276010.webp)
5 Handling Precautions for Traverse Unit
The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be
taken avoid caution to electrostatic breakdown when servicing and handling the laser diode.
5.1. Cautions to Be Taken in Handling the Optical Pickup Unit
The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body.
Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.
1. Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.
2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed should
be short-circuited with a short pin or a clip.
3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.
4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexible
cable, cut off the antistatic FPC.
5.2. Grounding for electrostatic breakdown prevention
Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be damaged by static
electricity in the working environment. Proceed servicing works under the working environment where grounding works is
completed.
5.2.1. Worktable grounding
1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.
5.2.2. Human body grounding
1. Use the anti-static wrist strap to discharge the static electricity form your body.
10
SA-HT740GCP
Summary of Contents for SA-HT740GCP
Page 7: ...7 SA HT740GCP ...
Page 11: ...11 SA HT740GCP ...
Page 18: ...8 1 3 Advanced Digital Sound 8 1 4 Easy to Use 8 1 5 HDMI Compatible Products 18 SA HT740GCP ...
Page 29: ...10 1 Disassembly Flow Chart 29 SA HT740GCP ...
Page 30: ...10 2 Main Components and P C B Locations 30 SA HT740GCP ...
Page 39: ...Step 3 Push tray assembly to the direction of arrow shown 39 SA HT740GCP ...
Page 52: ...SA HT740GCP 52 ...
Page 54: ...SA HT740GCP 54 ...
Page 62: ...62 SA HT740GCP ...
Page 80: ...SA HT740GCP 80 ...
Page 94: ...25 Exploded Views 25 1 Cabinet Parts Location 94 SA HT740GCP ...
Page 95: ...95 SA HT740GCP ...
Page 96: ...96 SA HT740GCP ...
Page 97: ...25 2 Packaging 97 SA HT740GCP ...